Spherical-shell accretion onto the black hole-torus system

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dc.contributor.authorDonmez, Orhan
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2015
dc.departmentNiğde ÖHÜ
dc.description.abstractThe general relativistic hydrodynamical simulation of the spherical-shell accretion onto the stable torus around non-rotating and rotating black holes isotropically falling from a finite distance are constructed for the first time. This type of accretion might be used to explain the dynamics of the torus. The accreted matter sonically, supersonically or highly supersonically interacts with a torus and forms a newly developed dynamical structure. This spherical-shell changes the angular momentum of the torus and mediates torus instabilities which cause the termination of the torus. The impact of the rest-mass density of the perturbation is also studied which found that the high density perturbation destroys the torus in a few dynamical times. It is also found that the dumping time of the matter is much larger for the torus around a rotating black hole. On the other hand, the Papaloizou-Pringle instability from the spherical-shell accretion appears to be much more softer than the former perturbations which are called the Bondi-Hoyle accretion and accretion of the bulk of gas. The Papaloizou-Pringle instability is damped in a short time scale immediately after their formation.
dc.description.sponsorshipNational Center for High Performance Computing of Turkey (UYBHM) [10022007]
dc.description.sponsorshipIt is my pleasure to thank the referee for many helpful comments on the original version of the manuscript. The numerical calculations were performed at the National Center for High Performance Computing of Turkey (UYBHM) under grant No. 10022007.
dc.identifier.doi10.1142/S0217732315500716
dc.identifier.issn0217-7323
dc.identifier.issn1793-6632
dc.identifier.issue14
dc.identifier.scopus2-s2.0-84928501143
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://dx.doi.org/10.1142/S0217732315500716
dc.identifier.urihttps://hdl.handle.net/11480/3940
dc.identifier.volume30
dc.identifier.wosWOS:000353297400003
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorDonmez, Orhan
dc.language.isoen
dc.publisherWORLD SCIENTIFIC PUBL CO PTE LTD
dc.relation.ispartofMODERN PHYSICS LETTERS A
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectGeneral relativistic hydrodynamics
dc.subjectnumerical relativity
dc.subjectspherical-shell accretion
dc.subjectblack hole
dc.subjecttorus
dc.titleSpherical-shell accretion onto the black hole-torus system
dc.typeArticle

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